Basic wood density of Acacia melanoxylon R. Br related to sample tree height, tree and site.

摘要

This study was conducted to assess basic wood density variations of Acacia melanoxylon according to sample tree height, tree, and site. Twenty trees were selected from four sites in Buenos Aires Province, Argentina. Wood density was determined over two disc samples at four tree height (base, breast height, 30% and 50% of total tree height). According to determined ages, some trees were divided into two groups according to age (26-32 years and 9-12 years) and data were analysed with an analysis of variance according to mixed model where tree was the random effect. Trees represent 74% of total random variance. Within tree, axial tendency of wood density was to decrease from the base toward breast height and then its value was stable to the top. This was consistent across all sites and age groups. Forest resource growing at Los Tuelches site presented the highest basic wood density.